AutoCodes – Generic – B3130

B3130 Code - All Doors Unlock Circuit

Quick Answer

The Body Control Module (BCM) supplies a 12-volt signal to the lock and unlock signal circuits of the driver and passenger door lock switches. Common causes include Faulty Door Latch Assembly, Door Latch Assembly harness is open or shorted, Door Latch Assembly circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B3130 indicates All Doors Unlock Circuit.
Common causes: Common causes include Faulty Door Latch Assembly, Door Latch Assembly harness is open or shorted, Door Latch Assembly circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,374

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 11, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B3130 Description

The Body Control Module (BCM) supplies a 12-volt signal to the lock and unlock signal circuits of the driver and passenger door lock switches. When the appropriate switch is pressed, a contact within the door lock switch closes providing a ground path for the signal circuit. The BCM will detect the voltage drop in the signal and will command the doors to perform the lock or unlock functions. The BCM may also receive a LOCK or UNLOCK command from the Keyless Entry Control Module.
The BCM, upon receipt of a lock switch lock or unlock signal, will supply voltage to the door lock actuator lock or unlock control circuits. Since the opposite side of the lock actuator is connected to the ground through the other lock actuator control circuit, the doors will then lock or unlock as commanded. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground or open/high resistance on a door latch control circuit.

OBDII Code B3130 - All Doors Unlock Circuit - AutoCodes.com — B3130 Code - All Doors Unlock Circuit

What does this mean?

What are the Possible Causes of the DTC B3130?

Faulty Door Latch Assembly
Door Latch Assembly harness is open or shorted
Door Latch Assembly circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3130?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3130 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B3130 code?

Need more information on how to fix the B3130 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3130 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B3130 Buick — All Doors Unlock Circuit
B3130 Cadillac — All Doors Unlock Circuit
B3130 Chevrolet — All Doors Unlock Circuit
B3130 GMC — All Doors Unlock Circuit

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B3130 Code

1. What are common symptoms of OBDII code B3130 (All Doors Unlock Circuit)?

- Common symptoms include all doors failing to unlock, intermittent issues with unlocking, or a non-responsive key fob.

2. What are possible causes of OBDII code B3130?

- Possible causes include a faulty door unlock relay, damaged wiring in the circuit, a malfunctioning keyless entry module, or a problem with the door lock actuator.

3. How can I diagnose the issue related to OBDII code B3130?

- You can diagnose the issue by checking the door unlock relay, inspecting the wiring for any damage, testing the keyless entry module, and examining the door lock actuators for proper function.

4. Can OBDII code B3130 be triggered by a dead key fob battery?

- Yes, a dead key fob battery can sometimes trigger code B3130 if it prevents the signal from reaching the keyless entry module.

5. Are there any quick repair tips for addressing OBDII code B3130?

- Quick repair tips include checking and replacing the key fob battery, ensuring all doors are properly closed, and inspecting the wiring connections for any loose or damaged wires.

6. Is it safe to continue driving with OBDII code B3130 unresolved?

- While OBDII code B3130 may not affect the drivability of the vehicle, it is recommended to address the issue promptly to ensure proper functioning of the door unlocking system.

7. Can a DIY enthusiast fix OBDII code B3130 at home?

- Depending on the root cause of the issue, DIY enthusiasts with automotive repair experience may be able to fix OBDII code B3130 by troubleshooting the components involved and making necessary repairs or replacements.

8. Is resetting the vehicle's computer system a solution for OBDII code B3130?

- Resetting the vehicle's computer system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the problem resurfaces.

9. Will disconnecting the battery reset OBDII code B3130?

- Disconnecting the battery may reset the code temporarily, but it is not a long-term solution unless the root cause of the issue is identified and resolved.

10. How can a professional mechanic help in fixing OBDII code B3130?

- A professional mechanic can use specialized diagnostic tools to pinpoint the exact cause of OBDII code B3130, perform thorough inspections, and carry out repairs with precision to ensure the issue is resolved effectively.